Gakuen Shimai

The story revolves around three main characters: the Nanase sisters, Arisa and Mika, who are popular college idols, and Sousuke, a typical student who secretly admires Arisa from a distance. One day, Mika approaches Sousuke after class to reveal that she and Arisa are now his siblings. This unexpected family connection comes from a romantic relationship between Sousuke's father, an adventurer, and the sisters' mother, an archaeologist, who met during an excavation in South America. As they begin to live together, Sousuke must navigate the complexities of their new sibling relationship while grappling with his feelings and desires. The narrative hints at potential awkward situations and playful interactions among the siblings, exploring themes of familial intimacy and attraction.